I am discussing drilling through the Earth with my students.
The classic cartoon version has a person drilling down in the United States and coming up in China, which has to be wrong because drilling from the northern hemisphere should come out in the southern hemisphere.
What I would like to get is a simple map of the Earth- single color background with continent / country borders only- with greyed-out / blued-out regions that don't have land on both sides of the dig.
I would like a map highlighting those regions of land that, when drilling through the Earth, end up on land on the other side. I want to view/highlight regions of land/land, land/water, and water/water.